I've found a previous thread, but there are a few unclear things:
I'm just a few weeks into my railway career. I can see the benefits of being a member of the RPS, particularly as the TOC are making a significant contribution to my pension fund. That said, my last job with the Local Authority were contributing 3 x my contribution, so the TOC and not that...
www.railforums.co.uk
I'm not railway staff, but my understanding is that BRASS is just the branding of the railway pension scheme's AVC offer, which is a defined contribution-type scheme - i.e. you pay in £10,000, you choose which funds/managed fund package its invested in, and then at retirement you can take out whatever that has grown/shrunk to as either drawdown, or an annuity, etc.
So what it comes down to is whether a) There's any difference in fees, b) Any difference in choices of funds available, c) Any Salary Sacrifice (NIC saving) potential? d) Cash free lump sum impact. (a) and (b) should be clear.
To elaborate on my two new points:
Salary Sacrifice
There are two ways a pension scheme can work. Say you earn £2k a month, and you pay 5% into pension.
Income Tax will only be calculated on the £1.9k, but
National Insurance will be calculated on the £2k. Similarly, if you pay into a pension scheme not linked to your employer, you will get the Income Tax relief only.
With Salary Sacrifice, you agree for your "contractual right to salary" to be £1.9k a month, with an agreement for £100 pension contribution a month. With this, the National Insurance contributions will only be calculated on the £1.9k, saving you tax. It's meant to be for a long-term arrangement, and shouldn't apply to ad-hoc contributions.
If recurring BRASS AVCs can be done via. Salary Sacrifice, then there will be an additional saving vs. going externally because you'r saving Income Tax and NICs rather than just Tax. In the previous thread there was some confusion about if that's offered for the main scheme and/or AVCs, and it might vary by section?
Cash Free Lump Sum
Normally, you are allowed to take up to 25% of a pension value out as a tax-free lump sum.
The Railway scheme gives you 1/40th of final average pay for every year of service as a lump sum. But it also allows you to sacrifice some/all of this to increase your recurring payout - at a rate of an extra £1/year for every £12 off the lump sum. This is a
very good deal for most people.
It sounds like (but do your own verification) you could take out 100% of your BRASS contributions as cash, assuming they'll by less than 25% value of the entire scheme (you won't be able to convert BRASS to annual income at the 1/12 rate, unless it was pre-2009). So an optimal plan would be to plan on converting the ordinary lump sum entitlement to normal income, and then use BRASS to have an actual lump sum.
Will emphasise it's definitely important to do your own research and potentially get advice, since there are lots of moving parts and it also depends on your wider plans/finances.